/**
 *  Copyright 2009 Henning Teek, Ingo Renner
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License. 
 */
package com.googlecode.chigs.web.common.forms;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.html.form.FormComponent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Ingo Renner
 * @author Henning Teek
 */
public class ValidationMsgBehavior extends AbstractBehavior {
	private final static Logger log = LoggerFactory.getLogger(ValidationMsgBehavior.class);

	public void onRendered(Component c) {
		if (FormComponent.class.isAssignableFrom(c.getClass())) {
			log.info("onComponentTag: c = " + c + ", c.getClass() = " + c.getClass());
			FormComponent fc = (FormComponent) c;
			if (!fc.isValid()) {		
				String error;
				if (fc.hasFeedbackMessage()) {
					error = fc.getFeedbackMessage().getMessage().toString();
					fc.getFeedbackMessage().markRendered();
				} else {
					error = "Your input is invalid.";
				}
				fc.getResponse().write("<div class=\"validationMsg\">" + error + "</div>");
			}
		}
	}
}
